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Cheap flights from Chicago (CHI) to Seattle (BFI)

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How to find the cheapest flight from Chicago (CHI) to Seattle (BFI)

How to find the cheapest flight from Chicago (CHI) to Seattle (BFI)
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How to find the cheapest flight from Chicago (CHI) to Seattle (BFI)
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How to find the cheapest flight from Chicago (CHI) to Seattle (BFI)
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Cheap flights from Chicago to Seattle in November , December 2026

23 Nov - 13 Dec $ 632.00
CHI
Chicago
Frontier Airlines
2 STOPS
BFI
Seattle
BFI
Seattle
Frontier Airlines
2 STOPS
CHI
Chicago
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23 Nov - 13 Dec $ 709.00
CHI
Chicago
Frontier Airlines
2 STOPS
BFI
Seattle
BFI
Seattle
Frontier Airlines
2 STOPS
CHI
Chicago
Pick dates
17 Nov - 13 Dec $ 754.00
CHI
Chicago
Frontier Airlines
2 STOPS
BFI
Seattle
BFI
Seattle
Frontier Airlines
2 STOPS
CHI
Chicago
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Last minute flights from Chicago to Seattle

23 Nov - 02 Dec $ 916.00
CHI
Chicago
Frontier Airlines
2 STOPS
BFI
Seattle
BFI
Seattle
Frontier Airlines
3 STOPS
CHI
Chicago
Pick dates
17 Nov - 02 Dec $ 1,039.00
CHI
Chicago
Frontier Airlines
2 STOPS
BFI
Seattle
BFI
Seattle
Frontier Airlines
3 STOPS
CHI
Chicago
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23 Nov - 30 Nov $ 1,184.00
CHI
Chicago
Frontier Airlines
2 STOPS
BFI
Seattle
BFI
Seattle
Frontier Airlines
2 STOPS
CHI
Chicago
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One-way flights to Seattle from Chicago

10:00 PM - 9:25 PM
Air Excursions
2 Stops
26h 15m
CHI - BFI
$ 321
Kiwi
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5:15 AM - 9:25 PM
Air Excursions
2 Stops
19h
CHI - BFI
$ 399
Kiwi
Pick dates
6:30 AM - 6:45 PM
Air Excursions
2 Stops
15h 5m
CHI - BFI
$ 444
Kiwi
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How to find the cheapest flight from Chicago (CHI) to Seattle (BFI)

Related info for your journey
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How to find the cheapest flight from Chicago (CHI) to Seattle (BFI)
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.
How to find the cheapest flight from Chicago (CHI) to Seattle (BFI)
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.